45408109 has 4 divisors (see below), whose sum is σ = 45468540. Its totient is φ = 45347680.

The previous prime is 45408107. The next prime is 45408127. The reversal of 45408109 is 90180454.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13801225 + 31606884 = 3715^2 + 5622^2 .

It is a cyclic number.

It is not a de Polignac number, because 45408109 - 2¹ = 45408107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45408107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29074 + ... + 30595.

It is an arithmetic number, because the mean of its divisors is an integer number (11367135).

Almost surely, 2^45408109 is an apocalyptic number.

It is an amenable number.

45408109 is a deficient number, since it is larger than the sum of its proper divisors (60431).

45408109 is an equidigital number, since it uses as much as digits as its factorization.

45408109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60430.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 45408109 is about 6738.5539249901. The cubic root of 45408109 is about 356.7613555720.

The spelling of 45408109 in words is "forty-five million, four hundred eight thousand, one hundred nine".